Improvement in steam-heaters



UNITED STATES PATENT OFFICE.

IMPROVEMENT IN STEAM-HEATERS.

Specification forming part of Letters Patent No. 132,418, dated October22, 1872.

To all whom it may concern:

Be it known that we, JAMES J. SMITH and SAMUEL R. WOOD, of Cleveland, inthe county of Ouyahoga and State of Ohio, have invented a new and usefulImprovement in Steam-Heaters, of which the following is a specification:

Figure l is a detail vertical longitudinal section of our improvedheater taken through the line 00 m, Fig. 2. Fig. 2 is a detail verticalcross-section of the same taken through the line 3 3 Fig. 1.

Similar letters of reference indicate corresponding parts.

Our invention has for its object to improve the construction ofsteam-heaters, so that they may more effectually warm the air beforeitis discharged into the room, and which shall at the same time besimple in construction and inexpensive in manufacture; and it consistsin the construction and combination of the various parts of the heater,as hereinafter more fully described.

- A arerectangular cast-iron boxes, into which the steam is introduced,and by contact with which the air is heated. In the lower part of theopposite sides of the boxes A, near one end,'are formed holes, in whichare inserted short pip'es to having a screw-thread cut in their innersurfaces. Any desired number of the boxes A are placed side by side andat a short distance apart, as shown in Fig. 2, and are connectedtogether by short pipes B, which have a right screw-thread out upon theouter surface of one end, and a left screw-thread in the outer surfaceof the other end, so that the said pipes B may be screwed into the pipesa oftwo adjacentboxes, A, by being turned. The middle part of the pipesB may be made polygonal in form to enable them to be readily grasped bya wrench. The space between each two boxes A is inclosed with a case, 0,

which has an opening, 0 in its bottom near the pipes at for the entranceof the air, and an opening, 0 in its top directly over the opening 0 forthe escape of the air. D is a horizontal partition extendinglongitudinally through the middle part of the space, between each twoboxes A from the end of the case 0, at or near which the openings 0 care formed, nearly to the other end of said box, thus forming a flue andcompelling the air to pass twice along the sides of the steam-boxes Abefore it escapes. The heater should be surrounded with a box or casingfitting closely to it at the sides and ends, but leaving spaces orcompartments at the bottom and top, as shown in Figs. 1 and 2. The coldair to be heated is designed to be introduced into the lower compartmentat the end furthest from the opening 0 The heated air escapes from theupper compartment into the register-pipe at the end of said compartmentfurthest from the opening 0 The air thus passes along the bottom of theheater before entering the holes 0, and along its top after escapingfrom the holes 0 The steam is introduced into the pipe a at one side ofthe boxes A, and it and the Water of condensation escape through thepipe a at the other side of said boxes.

Having thus described our invention, we claim as new, and desire tosecure by Letters Patent- The steam-boxes A, provided with short

